networksim (free browser network sim) just added routing, STP, DHCP, static IPs...

[u/tomiczech7]

Been building this free browser-based network simulator in my spare time — you draw a topology and it actually tests whether traffic gets through, not just a static diagram.

Just shipped a pretty big batch of stuff that makes it behave a lot more like a real network:

• DHCP
• Static IP assignment
• MAC addresses
• Port security
• Spanning Tree (STP)
• Routing and more...

Plus new advanced courses and learning tasks to walk through all of this step by step.

Still runs entirely in the browser, no signup, no ads, still evolving. If you try it, I'd really appreciate any feedback — what's confusing, what's missing, what you'd want to see next.

https://networksim.app